Earlier in my preface, I argued that the act of knowing brings us closer to a holy God because holy means both sacred and set apart. Rational thinking sets us apart from the object of our reflection just like God was set apart from his creation, not part of it. Yet, knowledge is also at the heart of sin, as we learn in Genesis 3 when Satan tempts Eve. Scripture praises knowledge when its object is God, but cautions us when it leads to pride. So we should take the attitude of the Apostle Paul vigorously defending the faith and pointing people to God (2 Cor 10:5-6).
So what is rational thinking?
The word, rational, implies that a conclusion comports with reason or logic. Rational thinking is thinking logically while thinking has to do with the work of the mind. Using logic and experience to judge rightly. In this context, rational thinking starts with making reasonable comparisons and associations.
Rational thinking benefits directly from logic, such as mathematics and mathematical relationships. We might argue, for example, that 1+1 = 2 which simply states that adding one to one makes two. Alternatively, we might argue that 1+1+1 > 2 which says that one plus one plus one is greater than two. Simple comparisons, like these two equations, make rational thinking extremely powerful in ordering our thinking and quickly admit substantial complexity.
Rational learning, which is based on comparisons, differs from behavioral learning because we need to stand back from simple responses to stimuli. For example, suppose I am a high school student trying to decide whether to take a full-time job or to enroll in college. From a behavioral learning perspective, the job provides an immediate benefit while college enrollment requires an immediate expense for tuition and living expenses so the obvious decision is to take the job. From a rational learning perspective, the lifetime earnings in the job may be only a small fraction of the lifetime earnings after completing a college degree, even accounting for costs involved so the decision likely is to enroll in college. While both alternatives involve uncertain outcomes, the behavior learning model focuses on short-term costs and benefits, while the rational learning model employs more information than simply immediate costs and benefits.
From a faith perspective, how we learn clearly affects our attitude about our faith, especially when it comes to future events. Think about our attitude about children. When our children are young, they require a lot of expense and attention. Even if they care for you in your senior years, such benefits are far into the future. Considering only the short-term costs and benefits, the behavior learning model suggests that having children is only a present cost, while the rational learning model weighs the current costs against future benefits. The calculation applies to living out our faith today in view of our future life in Christ. The sacrifice of praise on Sunday and of living a moral life the rest of the week has both present and future benefits, but only a rational evaluation sees beyond the sacrifice. Trust in God’s goodness and provision for our needs is also required
If blind response to stimulation leaves the exclusively behavioral learner at risk of addiction and of missing out of benefits preceded by costs, the exclusively rational learner falls prey to analysis paralysis. The rational learner patiently considers all available options, comparing costs and benefits. We all know Christians who get stuck evaluating all their options in life decisions and spend more time studying their faith than living it out. Coming to closure on decisions is frequently a problem for those specialized in rational decision making.
How do we come to closure on decisions? When should options be limited and a decision made?
In my experience, this is an opportunity to pray for God’s guidance. Where the behavioral decision maker needs to focus on developing patience in decision making, the rational decision maker needs to pray for guidance to be satisfied with the doors that God has already placed in front of them.
Ortberg, John . 2015. All the Places to Go—How Will You Know? God has Placed Before You an Open Door: What Will You Do? Carol Stream: Tyndale House Publishers, Inc.
 Compare, for example, (Prov 1:7; Isa 11:1; 2 Cor 4:6; Phil 1:9) with (1 Cor 8).
 John Ortberg (2015, 257) sees the opened door is a fitting metaphor for how God invites us to step out in faith and service rather than having us wait for confirmation and comfort. He writes (10): “It’s an open door. To find out what’s on the other side, you’ll have to go through.” This opened door invitation always appears riskier than it really is because of who offers the invitation and for what purpose. The purpose that Ortberg sees is intensely interesting: “God’s primary will for your life is not the achievements you accrue; it’s the person you become.” (15). As God tells Abram: “I will bless those who bless you, and him who dishonors you I will curse, and in you all the families of the earth shall be blessed.” (Gen 12:3; 9, 35). In offering such blessings, God invites us to decide which doors to go through as part of our sanctification (16) and our decisions form our character and mold our identity (8).
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